1、H-0 8- 97 MIL-L-46150 15 April 1.971 SUPERSEDING RIAPD- 688A 1 March 1968 MILITARY SPECIFICATION LUBRICANT, WEAPONS, SEMI-FLUID (HIGH IX)AD-CARRYING CAPACITY) This specification is mandatory for use by all Departments and Agencies of the Department of Defense 1. SCOPE 1.1 This specification covers o
2、ne grade of semi-fluid lubricant which provides a low coefficient of friction and high load-carrying capacity (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent
3、specified herein. SPECIFICATIONS FEDERAL L-P-403 - Plastic Molding Material, Polytetrafluoroethylene (TFE- Fluorocarbon) P-D-680 - Dry Cleaning Solvent TT-N-95 - Naphtha, Aliphatic W-L-800 - Lubricating Oil, General Purpose, Preservative (Water Displacing, Low Temperature) MILITARY MIL-L-46000 - Lub
4、ricating Oil, Semi-Fluid (Automatic Weapons) STANDARDS FEDERAL Fed. Test Method Std. No. 791 - Lubricants, Liquid Fuels, and Related Products; Methods of Testing MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-290 - Packaging, Packing, and Marking of Petrol
5、eum and .Related Products THIS DOCUMENT CONTAINS 10 PAGES. - t fi- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c - flIL-L-LIb150 71 7777706 0307b38 9 MIL- L- 46 150 QUALIFIED PRODUCTS LISTS QPL-46000 - Qualified Products List of Products Qualifie
6、d Under Military Specification MIL-L-46000: Lubricating Oil Semi-Fluid (Automatic Weapons) DRAWINGS AND PARTS LISTS Drawing and Parts List for Electric Drive Assembly: (15 April 1965) Drawing and Parts List for Electric Drive Assembly: (10 August 1965) Part No. 6569761 Part No. 11686350 (Copies of s
7、pecifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer. ) (Copies of the drawings and parts lists referenced above can be obtained from Hq.,
8、U. S. Army Weapons Command, ATTN: Illinois 61201.) AMSWE-RET-ML, Rock Island, 2.2- Other publications, The following document6 form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shal
9、l apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) TEST METHODS D 128 - Analysis of Lubricating Grease D 130 D 270 D 942 D 972 D 1092 - Apparent Viscosity of Lubricating Greases D 1261 - Effect of Grease on Copper D.1457 - TFE-Fluorocarbon Resin Molding and Extrusion Materials D 1478 - Low-T
10、emperature Torque of Ball Bearing Greaqes I) 1743 - Rust Preventive Properties of Lubricating Greases D 2266 - Wear Preventive Characteristics of Lubricating Grease (Four- D 2596 - Measurement of Extreme-Pressure Properties of Lubricating Grease - Detection of Copper Corrosion from Petroleum Product
11、s by the - Sampling Petroleum and Petroleum Products - Oxidation Stability of Lubricating Greases by the Oxygen - Evaporation Loss of Lubricating Greases and Oils . Copper Strip Tarnish Test Bomb Method Ball Method) (Four-Ball Method) (Application for copies should be addressed to the American Socie
12、ty for Testing;and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) - ? 2 ./ - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-L-b250 73 W 777770b 0307677 b MIL-L-46150 Specifications and standards of technical societies are gener
13、ally available for reference from libraries. agencies. They are also distributed among using Federal 3. REQUIREMENTS 3.1 Material. The semi-fluid lubricant shall consist of 75 f 1 percent by weight of lubricating oil and 25 f 1 percent by weight of polytetrafluoro- ethylene (PTFE) molding material.
14、requirements of MIL-L-46000 and shall be listed, or approved for listing on the qualified products list of that specification (QPL-46000). molding material shall conform to the requirements of L-P-403, type IV, class 1 (see 6.4a). The lubricating oil shall meet all the The PTFE 3.2 Qualification. Se
15、mi-fluid lubricants furnished under this specifica- tion shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.5.1 and 6.3). 3.3 Physical and chemical requirements. The semi-fluid lubricant shall conform to the requirem
16、ents of table I and of 3.3.2 through 3.4. tetrafluoroethylene molding powder shall conform to the requirements of 3.3.1. The poly- Table I. Physical and chemical requirements for the finished lubricant (see 4.6) Properties Requirements Evaporation loss at 300F (149OC) in 8 hours, max, percent Rust p
17、revention: or manufactured in a single plant run (not exceeding 24 hours), through the same processing equipment, with no change in the ingredient materials. An indefinite number of unit containers of identical size and type, offered for acceptance, and filled with a homogeneous mixture of lubricant
18、 from a single, isolated container; or filled with a homogeneous mixture of lubricant manufactured in a single plant run (not exceeding 24 hours), through the same processing equipment, with no change in the ingre- dient materials. 4.2,2 Packaged lot. 4.3 Sampling. 4.3.1 Sampling for examination of
19、filled containers. Take a random sample of filled containers from each lot in accordance with MIL-STD-105 at inspec- tion level II and acceptable quality level (AQL) = 2.5 percent defective: 4.3.2 Sampling for tests. Take samples for tests in accordance with ASTM method D 270. 4.4 Inspection. Conduc
20、t inspection in accordance with method 9601 of Fed. Test Method Std. No. 791. 4.4.1 Examination of filled containers. Examine samples taken in accord- ance with 4.3.1 for compliance with MIL-STD-290 with regard to fill, closure, sealing, leakage, packaging, packing, and marking requirements. Reject
21、any Container having one or more defects or under the required fill. number of defective or underfilled containers exceeds the acceptance number for the appropriate sampling plan of MIL-STD-105, reject the lot represented by the sample. If the 4.5 Classification of tests. Tests are classified as fol
22、lows: a. Qualification tests b. Quality conformance tests 4.5.1 Qualification tests. Qualification tests consist of tests for all of the requirements specified in section 3. 4-5.2 Quality conformance tests. Quality conformance tests consist of tests for the allowing requirements (see table I): Evapo
23、ration loss (D 972) Rust prevention (D 1743) Torque at -65F (54OC) (D 1478) Wear prevention (D 2266) 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-LIbLSO 71 m 9777906 O307702 2 MIL- L- 4 6 15 O 4.6 Test methods. Perform tests in accordance
24、with the applicable test methods specified in table II and in 4.6.1, 4.6.2, 4.6.3, and 4.6.4. Table 11. Test methods - ASTM Test Method No. Test Evaporation loss- i/ Rust prevention Oxidation stability21 Torque at -65F Apparent Wear prevention- Extreme pressure properties, Load Wear Indexzl Melting
25、point of polytetrafluoroethylene Reaction of lubricant with copper D 972 D 1743 D 942 D 1478 D 1092 D 2266 D 2596 D 1457 D 1261 LPerform the evaporation test at 300“ f 2F (149“ f 1C) for 8 hours f ?Perform the oxidation stability test at 300“ f 2F (149 i 1C). /Perform the apparent viscosity test at
26、-65 f 0.5F (-54 f 0.3C). k/Perforrn the wear prevention test at 250“ i 2F (121 f 1C). ?/See 6.4. 5 minutes. 4.6.1 Kinetic coefficient of friction. Determine the kinetic coefficient of friction on a “Cincinnati“ Stick-Slip Lubricant Testing Machine (see 6.4b) or on an equivalent machine approved by t
27、he qualifying activity (see 6.3). face finish of 200 microinches, r.m.6. (see 6.4b). blocks in petroleum naphtha meeting the requirements of TT-N-95 and dry with clean, dry, compressed air. on the tester. the lubricant between the blocks. the blocks with a spatula. minute under 8 load of 20 pounds f
28、or three minutes to establish a uniform bearing surface, the tester speed to 3/4 inch of travel per minute. By means of the dial indicator, determine the displacements in both directions under loads of 20 pounds, 40 pounds, 60 pounds, and 80 pounds, respectively. kinetic coefficients of friction (p)
29、 by the formula: Use Meehanite, Type GE, cast-iron friction blocks having a $ur- Wash the Meehanite Mount the blocks in their respective locations Spread the lubricant over the surface of Operate the tester at a speed of 120 inches per At the end of the three-minute stabilizing period, chapge Separa
30、te the blocks slightly and place a liberal amount of . Calculate the 6 - li Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-L-96150 91 7797906 0307703 MIL-L-46150 Total deflection 8 x load P Where : Total deflection is the sum of the indicator r
31、eadings in both directions of travel Load is the force in pounds applied to the test blocks Take an average of the coefficients of friction obtained under the four different test loads and report the average as the coefficient of friction of the lubricant. 4.6.2 Polytetrafluoroethylene content. Remo
32、ve the insoluble matter in the lubricant in accordance with the procedure .for “Insolubles“ in method I of ASTM D 128. Consider all such insoluble matter to be polytetrafluoro- ethylene. 4.6.3 Machine-gun performance, Test the lubricant for performance in the 7.62 mm, GAU-2B/A machine gun with two e
33、lectric drive assemblies, to permit the weapon to be operated at a high rate of fire and a low rate of fire. If a failure occurs during any part of the test sequence, discontinue the test and consider the lubricant to have failed the performance requirement., 4.6.3.1 High rate of fire. Use an Electr
34、ic Drive Assembly, Part No. 65C9761, to provide a firing rate of 6000 rounds per minute. Design details for this drive assembly are contained in Drawing No. 65C9761 and Engineering Parts List No. 65C9761 (see 2.1). a. Ambient temperature. Disassemble the gun and clean it of all traces of lubricant a
35、nddirt by washing it with dry cleaning solvent conform- L ing to P-D-680. clean, or relubricate the sealed, grease-lubricated bearing. During dis- assembly of the gun, rotate the bearing, examine it for flat surfaces and replace it if defective. Remove the solvent completely from all surfaces of the
36、 gun, using a water-free air jet if necessary. Coat the gun compo- nents, except the barrels, with the test lubricant. Burnish the lubricant into the surfaces of the components. bores and on the external surfaces, with lubricating oil conforming to W-L-800. Reassemble the gun, making sure that the t
37、hreaded bolts are tightened to a measured degree with a torque wrench. with the test lubricant to ensure that the torque indicates tightening rather than friction caused by roughness of the threads. nents of five 100-round bursts at an ambient temperature of 40“ to 100F f4+380C), allowing three minu
38、tes of cooling between complements. the test, accelerate the firing rate to a minimum of 6000 rounds per minute within 0.4 seconds. presence of dry areas, carbon, uneven wearing, galling, or other undesirable conditions. Do not use a chlorinaied solvent. Do not disassemble, Coat the barrels lightly,
39、 both in the Lubricate these bolts Fire two compo- During After completing the test, examine the gun for the 7 De Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- L- 46 150 b. Low temperature. After satisfactory completion of the ambient temperat
40、ure test, disassemble, clean, relubricate and soak the gun at -30F (-34OC) for four hours. Soak the ammunition at the same temperature, Posi- tion the feed belt for firing so that the first round can be fired without disturbing the coating. Fire three 100-round bursts at an ambient tempera- ture of.
41、-30F (-34OC), allowing two hours of coollng between bursts, During the test, accelerate the firing rate to a minimum of 4500 rounds per minute within 0.5 seconds. presence of dry areas, carbon, uneven wearing, galling, or other undesirable effects. After completing the test, examine the gun for the
42、c. High temperature. After satisfactory completion of the low temperature test, clean, relubricaie, and soak the gun at 260F (127OC) for four hours. Do not soak the ammunition, Before firing, allow the ambient temperature to drop to a minimum of 180F (82OC). Fire three 100-round bursts at the 180F a
43、mbient temperature, allowing sufficient cooling to permit reloading. of 6000 rounds per minute within 0.5 seconds. After completing the test, examine the gun for the presence of dry areas, carbon, uneven wearing, galling, or other undesirable effects. During the test, accelerate the firing rate to a
44、 minimum 4.6.3.2 Low rate of fire. Use an Electric Drive Assembly, Part No. 11686350, to provide a firing rate of 200 rounds per minute. for this drive assembly are contained in Drawing No. 11686350 and Engineer- ing Parts List No. 11686350 (see 2.1) Design details a. Ambient temperature. Use the pr
45、ocedure for the high rate of . fire, ambient temperature test (4.6.3.1a) with the following exception: Accelerate the firing rate eo a minimum of 2000 rounds per minute within 0.4 seconds. of dry areas, carbon, uneven wearing, galling, or other undesirable effects. After completing the test, examine
46、 the gun for the presence b. Low temperature. Use the procedure for the high rate of fire, low temperature test (4.6.3.1b) with the following exception: Accelerate the firing rate to a minimum of 1500 rounds per minute within 0.5 seconds. After completing the test, examine the gun for the presence o
47、f dry areas, carbon, uneven wearing, galling, or other undesirable effects. c. High temperature. Use the procedure for the high rate of fire. hinh temperature test (4.6.3.1) with the following exception: - Accelerate the-firing rate io a minimum of 2000 rounds per minute within 0.5 seconds. of dry a
48、reas, carbon, uneven wearing, galling, or other undesirable effects. After completing the test, examine the gun for the presence 8 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- L- 46 15 O . 4.6.4 Storage stability. Mix thk contehts of the or
49、iginal container of the lubricant thoroughly to produce a uniform mixture. trolytic beaker with lubricant to within one inch (25 mm) of the top. the surface of the lubricant with a spatula. Seal the beaker tightly, and store it for six months at 77 f 3F (25O f 2C). At the end of this period examine the contents of the beaker for conformance to 3.3.4. Fill a 250-ml elec- Smooth 5. PREPARATION FOR DELZVERY 5.1 Pac
